Description of conceptual model
This section describes Datahub’s internal data model on a conceptual level, i.e. the structure onto which data supplied by parties to Datahub and data generated by Datahub is stored. The data model does not describe Datahub’s physical database, nor is it a complete description of the Datahub data model. We aim to outline the most important data sets for the market processes as well as their relationships. Master data set attributes are listed in data model figures. A more specified definition of each attribute can be found in a separately published Excel spreadsheet (Datahub data standard). When looking at the figures, special attention should be paid to the fact that data marked as optional in the figure may be compulsory depending on other data. For example, fuse size at an accounting point is compulsory if the electric power is not reported.
The content of data sent by parties to Datahub and vice versa in processes is depicted in Datahub events and business processes using event-specific class diagrams.
Master data sets (entities) and the relationships between them are set out below. Not all master data sets in the table are in the above-mentioned conceptual model, but they occur in more detailed data model diagrams in Datahub events and business processes.
Descriptions of entities in the Datahub data model:
Entity | Definition | Synonyms | Relationships |
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Party | A company or organisation that operates in one or more roles on the electricity retail market. The party must have an agreement with Datahub. | Electricity market party | A party can have one or more roles (supplier, DSO, third party). |
Supplier | A party which acts as a supplier on the electricity retail markets. The supplier has an electricity sales and/or purchase agreement with a customer. The supplier may be an open supplier or deliver a fixed amount of electricity (“fixed delivery”). | Electricity supplier |
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Distribution system operator | A party which manages one or several distribution grids or high voltage distribution grids and practices licensed electricity grid operations in the grid. | DSO, Grid Company | A DSO manages one or more metering grid areas in the grids it controls and therefore manages all accounting points as well as other metering points in the metering grid area. |
Third party | A party that is neither a supplier nor a DSO. It has an agreement with Datahub and acts in a certain role on the electricity retail market with the authorisation of a supplier, DSO or customer. |
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Metering grid area | An area defined in the grid managed by a DSO and to which accounting points and other metering points are connected. | MGA, Grid (Area) | A metering grid area is always managed by one DSO, but the DSO for the metering grid area may change due to, e.g., merges. |
Customer | A natural person, company or organisation with an agreement for electricity sales, electricity supply and/or electricity purchasing with a supplier and/or a grid agreement with a DSO and which acquires or produces electricity mainly for its own use. | Electricity user, End user | A customer may have one or more sales and/or grid agreements. |
Metering point | A general term for points on the grid where metering is carried out. Accounting points are one kind of metering point, others are exchange points and production points, which are required. |
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Accounting point | A data set related to a physical location, for example, a dwelling, which connects a customer to a DSO and an electricity supplier through a grid and sales agreement, and in which the consumption or production of electricity can be metered. |
| There can only be one valid sales agreement and one valid grid agreement for an accounting point at any given time. The accounting point can only belong to one metering grid area and is therefore only managed by one DSO. The accounting point can be connected to another accounting point, whereupon it is possible to tell if the physical address contains both consumption and production accounting points. |
Sales agreement | A contract by which the customer buys and the supplier sells electrical energy. Electricity retail sales are regarded as the sale of electricity through the distribution grid directly to users of electricity or indirectly to users through the internal grid of a property or a corresponding group of properties. In the data model and information exchange, purchase agreements are processed as sales agreements linked to a production accounting point. |
| A sales agreement can only be linked to a single accounting point. One or more customers can be connected to a sales agreement. |
Grid agreement | A contract between the DSO and a customer regarding the grid service the customer requires. In the data model and information exchange, small-scale production grid agreements are processed as grid agreements connected to a production accounting point. | Transmission agreement | A grid agreement can only be connected to a single accounting point. One or more customers can be connected to a grid agreement. |
Address | Addresses stored in Datahub relate either to an accounting point, a customer or a sales/grid agreement. The official address for an accounting point and a customer is the postal address. Agreement-specific invoicing addresses can either be postal addresses or electronic addresses. |
| An accounting point can have one or more addresses (corner buildings, language versions). Customers have a single, official address. Sales and grid agreements can have one invoicing address each, which may also be an electronic address. |
Contact person | Agreement-specific contact person details which need to be exchanged between parties. Contact persons may differ between sales and grid agreements, and only those that the party deems necessary to forward to the other party (from the supplier to the DSO or from the DSO to the supplier) are reported to Datahub. |
| A sales or grid Agreement can have one or more contact persons. |